spark plugs - Team Camaro Tech
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post #1 of 3 (permalink) Old May 17th, 04, 08:32 AM Thread Starter
Join Date: May 2004
Location: Arkansas
Posts: 8

Hey everyone, just joined the forum.
I have a 68 Camaro with a 350 bored .60 over, flat top pistons, 300 hp douple humps, Torker II intake, headers, 600 Edlebrok carb., 2 1/2 in. exhaust, and a ProForm 50,000 volt HEI. The HEI and the Torker II intake are new, I had a old Torker before, and just a GM HEI. Ok now my question, while installing the HEI and getting my timing correct, when I pulled out the #1 spark plug I noticed it was paper bag brown. To Lean , right, well I then checked the #3 plug, it was not like #1 was, it was more darker like new , but little blacker. Have I got a burnt valve? Or am I running to lean? I haven't pulled anymore plugs to check them yet. It seems to run very strong as normal, though yesterday I noticed a couple of times a flat spot where it wanted to bog a little while in between shifts. I know the plugs probably need replaced they have been in there awhile, but the car only gets driven maybe 3000 miles or less a year.
Anybody help, or need anymore info?
chevysscamaro is offline  
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post #2 of 3 (permalink) Old May 17th, 04, 11:18 AM Thread Starter
Join Date: May 2004
Location: Arkansas
Posts: 8

The brownish color had lots of build up as well.
chevysscamaro is offline  
post #3 of 3 (permalink) Old May 17th, 04, 11:45 AM
Senior Tech
Join Date: Jan 2001
Location: Raleigh, NC
Posts: 1,046

I would go ahead and pull all of the plugs first before I jumped to conclusions. With your low yearly mileage, your plugs probably got that way before the change. You could clean them, check the gap, and heat range and put them back in, or, your could put some fresh ones in... I would go fresh, and drive a few hundred miles and check them again. Use a vacuum gauge and tune your carb idle quality when you put the new plugs in. If you are hitting a flat spot, you may need to change the metering rods. Edelbrock has a calibration kit with an very good instruction manual. And, as you already know, re-check the timing... You sound as if you already have a handle on that ...
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